Add Device Motion package

Introduces smart-phone device's acceleration, gravity, rotation, and orientation signals for dynamic pattern creation in Strudel.

packages/motion/README.md

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+# @strudel/motion
+
+This package adds device motion sensing functionality to strudel Patterns.
+
+## Install
+
+```sh
+npm i @strudel/motion --save
+```
+
+## Setup SSL for Local Development
+`DeviceMotionEvent` only work over HTTPS, so you'll need to set up SSL for local development.
+install SSL plugin for Vite
+`pnpm install -D @vitejs/plugin-basic-ssl`
+
+add the basicSsl plugin to the defineConfig block in `strudel/website/astro.config.mjs`
+```
+vite: {
+  plugins: [basicSsl()],
+  server: {
+    host: '0.0.0.0', // Ensures it binds to all network interfaces
+    // https: { 
+    //   key: '../../key.pem', //
+    //   cert: '../../cert.pem',
+    // },
+  },
+},
+```
+
+generate SSL cert if its necessary
+
+`openssl req -new -newkey rsa:2048 -days 365 -nodes -x509 -keyout key.pem -out cert.pem`
+
+## Usage
+
+| Motion  | Long Names & Aliases | Description |
+|----------------------------|-----------------------------------------------------------|------------------------------------------|
+| Acceleration | accelerationX (accX), accelerationY (accY), accelerationZ (accZ) | X, Y, Z-axis acceleration values |
+| Gravity | gravityX (gravX), gravityY (gravY), gravityZ (gravZ) | X, Y, Z-axis gravity values |
+| Rotation | rotationAlpha (rotA, rotZ), rotationBeta (rotB, rotX), rotationGamma (rotG, rotY) | Rotation around alpha, beta, gamma axes and mapped to X, Y, Z  |
+| Orientation | orientationAlpha (oriA, oriZ), orientationBeta (oriB, oriX), orientationGamma (oriG, oriY) | Orientation alpha, beta, gamma values and mapped to X, Y, Z  |
+| Absolute Orientation | absoluteOrientationAlpha (absOriA, absOriZ), absoluteOrientationBeta (absOriB, absOriX), absoluteOrientationGamma (absOriG, absOriY) | Absolute orientation alpha, beta, gamma values and mapped to X, Y, Z |
+
+## Example
+
+```
+enableMotion() //enable DeviceMotion 
+
+let tempo = 200
+
+$_: accX.segment(16).gain().log()
+
+$:n("[0 1 3 1 5 4]/4")
+  .scale("Bb:lydian")
+  .sometimesBy(0.5,sub(note(12)))
+  .lpf(gravityY.range(20,1000))
+  .lpq(gravityZ.range(1,30))
+  .lpenv(gravityX.range(2,2))
+  .gain(oriX.range(0.2,0.8))
+  .room(oriZ.range(0,0.5))
+  .attack(oriY.range(0,0.3))
+  .delay(rotG.range(0,1))
+  .decay(rotA.range(0,1))
+  .attack(rotB.range(0,0.1))
+  .sound("sawtooth").cpm(tempo)
+```

packages/motion/index.mjs

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+import './motion.mjs';
+
+export * from './motion.mjs';